Self-threading shuttle.



PATENTBD MAY 12,1903.

S. B. CUTTING. SELF THREADING SHUTTLE.

APPLICATION FILED JULY 1,1902.

30 MODEL.

WITNESSES:

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UNIFD STATES Patented May 12, 1903.

SAMUEL B. CUTTING, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE SALTS TEXTILE MANUFACTURING COMPANY, OF NEW CORPORATION OF CONNECTICUT.

YORK, N. Y.,A

SELF-THREADI NG SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 727,594, dated May 12, 1903.

Application filed July 1,1902. Serial No. 113,960. (No model.)

To all whom, it may concern:

Be it known that I, SAMUEL B. CUTTING,-a citizen of the United States, and a resident of Bridgeport, Connecticut, have invented certain new and useful Improvements in Shuttles, of which the following is a specification.

This invention has for its object an improvement in shuttles, and it relates particularly to what is known as a self-threading shuttle whereby a constant and uniform tension is maintained on the thread during the operation of weaving.

In the use of self-threading shuttles the maintenance of a uniform and constant tension on the thread is of importance, and various expedients have been employed to produce a tension or drag on the thread in that type of shuttle, but they have proved deficient and unsatisfactory. In the form most commonly heretofore employed it has been impossible to maintain the thread, during the weaving, in constant contact with the frictionproducing surface, with the result that at times the thread runs free and at other times it is under more or less tension,'resulting in a variation in the quality of the product.

I have selected a well-known form of selfthreading shuttle to illustrate the application and manner of using myinvention, although it is to be understood that the invention is applicable generally to that class of shuttles and is not to be limited in its use to the particular form shown. Reference may be had to United States Patents Nos. 454,807, 454,808,

454,809, 454,810, and 454,811, granted June.

23, 1891, to James H. Northrop, for a fulldescription of a shuttle to which my invention may be applied and of the loom and the method of employment of such shuttles.

My invention is illustrated in the accompanying drawings, in which Figure 1 is a top View of a self-threading shuttle with my improvement. Fig. 2 is a side view of the delivery end of the-same. Fig. 3 is a transverse sectional view on the plane of the line 3 3 of Fig. 1. Fig. i is a transverse sectional view of a modified adaptation of my invention. Fig. 5 is a longitudinal sectional view of a modified form of a tension device on. the plane of the line 5 5 of Fig. 6 that may be employed, and Fig. 6 is a top view of Fig. 5. p

Similar letters of referenceindicate similar parts in the several views.

The type of self-threading shuttle shown in the drawings has two openings in it, and the shuttle is filled and threaded in the manner described in the patents above referred to. As my invention has to do with a tension for the. thread, I shall describe only so much of the shuttle as may be necessary to an understanding of the tensiondevice.

The top wall of the delivery endof the shuttle-case A is grooved or slotted at a to the eye of in the side Wall of the shuttle to leave a space to constitute what is termed a selfthreading slot into which the weft or filling thread from the bobbin may be laid. Cooperatingwith this groove is a guide C, comprising a top plate, which in the form shown is slotted at c and c and has a point or nose 0*, which latter overlaps the slot 0 and under which the weft b may be drawn when laid in the slots 0 and c. The walls 0- and c of the top plate are inclined downwardly to the slot (3 to assist in guiding the thread to said slot. The shuttle-case is cut out to provide a seat for the guide C, and the latter may be socured in its seat by any suitable means.

" B designates a'bobbin of the usual form, which carries the fillings B. This bobbin has its head provided with annular rings or projections b to enter notches in the springholding jaws b and 12 all as fully described slots 0 and o to provide a space C for the re ception of the tension device, constituted of two disks d and d. The disks are held in yielding contact with each other by any suitable form of spring. As a preferred construction I have shown the depending side walls 0 and c of the guide C formed with exand tap-screws e and. 6 taking into the threaded outer ends of said hubs. The springs exert pressure upon the disks to hold them .in contact'wit'h each other to a degree sufficient to maintain the desired tension on the thread, and the degree of tension may be varied to suit different threads or difierent conditions of weaving by adjusting the screws 6 and e in or out, access to said screws being had through openings a and a formed in the sides of the shuttle-case. The tension-disks are supported on a pin d passing through openings in said disks and seated in openings in. the side walls 0 and c? of the guide 0. The nipples d and d also serve to maintain the disks in position and to prevent their displacement. Tofacilitate the entry of the thread between the tension-disks, the upper edges of said disks are made flaring, so as to provide a groove substantially in line with the slots 0 and c. WVhen a bobbin is automatically inserted into a shuttle to replace a bobbin on which the thread has been broken, exhausted, or denuded to a predetermined extent, the end of the thread 19 will be drawn into the slots 0 and c and under the nose 0 and the thread will be caused to follow into and through the delivery-eye, to be thereafter properly delivered from the shuttle, all as done heretofore. The slot 0 lies in a horizontal plane slightly above that of the slot 0, as shown in Fig. 5, so that as the thread is drawn through said slots and under the walls 0 and c of the top plate it will be guided between the flared upper edges of the tensiondisks and will be drawn down between said disks and a constant tension thereafter maintained onthe thread during the weaving. By locating the tension device intermediate the two slots 0 and c or intermediate the inner end of the guide and the nose 0 it will be seen that the threading of the shuttle insures the application of the tension. Owing to the peculiar construction of the guide and threading devices, it is impossible for the thread to be releasedfrom the operation of the tension during the weaving. Should the thread on the first pick not be drawn down between the tension-disks, the stoppage of the shuttle after the first pick and the sudden impulse imparted to the shuttle by the picker-stick on the second pick will positively insure the carrying of the thread into proper position between the disks.

With some 'forms of shuttle it may not be essential or necessary to provide means for varying the degree of tension on the thread. In such case the tension-disks may be held in yielding contact with each other by means of springs, which may be either flat, as shown at e and e in Fig. 4, or coiled, as shown in Fig. 3. In either case one end of the spring will be secured to the inner face of the sides 0 and o of the guide 0 with the other end resting againt the side of the disk. In this form the tension on the springs may be adjusted in the assembling of the shuttle and remains constant.

The mode of threading the shuttle shown in Fig. 4 is the same as that when using the form shown in Figs. 1 and 3, the tension being applied to the thread on or directly after the threading of the shuttle.

In Figs. 5 and 6 I have shown another form of tension employing bristles F, set into a suitable base or block F. This block is seated on the floor of the guide 0 and between the side walls 0 and 0 the bristles being of sufficient length to project nearly to or slightly below the plane of the top plate of the guide O and intermediate the slots 0 and 0, so that the thread as it is laid in said slots will also fall in the midst of the bristles, there being a sufficient number of the bristles and the bristles so closely disposed as to insure frictional engaging surfaces to maintain a constant friction on the thread.

While I have illustrated and described what is technically termed a bobbin, I intend by the term to include all kinds of bobbins,.skewers, spindles, tubes, and other carrying devices upon which the filling-thread may be held and from which it is unwound during the movement of the shuttle.

The tension-disks d and d, Figs. 1, 3, and

4, I prefert0 make of steel; but they may be made of porcelain or other suitable material.

WhatI claim, and desire to secure by Letters Patent, is

1. The combination in a shuttle of means to automatically thread the same and means to automatically apply and maintain a practically constant and uniform tension on the thread during weaving.

2. The combination in a shuttle of means to automatically thread the same, and a tension device located in the shuttle adjacent the threading means and i-nthe path of the thread to automatically apply and maintain a practically constant and uniform tension on the thread during weaving.

3. The combination in a shuttle of an automatic threading device located therein and comprising a thread-guide, a tension device located in proximityto said guide and in the path of the thread to automatically apply and maintain a practically constant and uniform tension on the thread during weaving.

4. The combination in a shuttle of means to automatically thread the same, and means to impart a practically constant and uniform tension on the thread during Weavin 5. A self-threading shuttle comprising a slotted guide in combination with a tension device supported by said guide intermediate the slots thereof whereby the thread is guided to said tension device in the act of threading the shuttle.

6. A shuttle provided with an opening for the reception of a bobbin and another open ing for the discharge of a bobbin, in combination with means for automatically threading the shuttle and a tension device carried by the shuttle adapted to automatically apply constant pressure to the thread, whereby the thread is made tense.

7. A self-threading shuttle comprising a slotted thread-guide, in combination with a tension device supported by said guide and lying in the slot thereof, whereby the-thread is guided to said tension device in connection with the operation of threading.

8. A self-threading shuttle comprising a slotted threadguide, in combination with a tension device comprising two parts adapted to receive the thread between them, and means adapted to constantly press said parts of the tension device together.

9. A self-threading shuttle comprising a slotted thread-guide, in combination with a tension device comprising two parts adapted to receive the thread between them, and means adapted to constantly press said parts of the tension device together; said tension device being supported by said guide in substantial alinement with the slots of the guide.

10. A self-threading shuttle comprising a slotted thread-guide, in combination with a tension device comprising two parts adapted to receive the thread between them, and means adapted to constantly press said parts of the tension device together; said tension device being supported by said guide intermediate the ends thereof.

11. A self-threading shuttle comprising a slotted threadguide, in combination withia tension device comprising two parts adapted to receive the thread between them, and means adapted to constantly press said parts of the tension device together; said tension device lying in said slot.

12. A self-threading shuttle comprising a slotted thread-guide, in combination with a tension device comprising two members adapted to receive the thread between them and apply pressure to the same whereby the same is made tense, said tension device lying in the path of the thread and edges of said members being slightly flared or separated to facilitate the entrance between same of the thread in connection with the operation of threading the shuttle.

13. A self-threading shuttle comprising a slotted thread-guide, in combination with a tension device comprising two members adapted to receive the thread between them and apply pressure to the same whereby the same is made tense, said tension device lying in the path of the thread and edges of said members being slightly flared or separated whereby a groove or trough is formed, which lies in the path of the thread and'whieh is adapted to facilitate the entrance of the thread into the tension device in connection with the operation of threading the shuttle.

14. A self-threading shuttle comprising a slotted thread-guide in combination With a tension device consisting of spring-pressed disks, said disks being supported by said guidein alinement with the slots of the guide.

15. A self-threading shuttle comprising a slotted thread-guide in combination with a tension device consisting of spring-pressed disks said disks supported by said guide and having flared edges to form a groove in alinement with the slots of the guide.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL B. CUTTING.

Witnesses:

ARTHUR OAKLEY, ALFRED HOLROYD. 

